Applications of CoMo/calcined quaternary hydrotalcites for hydrotreatment reactions

Linares, Carlos F.; Vásquez, Maryuri; Castillo, Rafhael; Bretto, Pablo; Solano, Roger; Rincón, Anaís

doi:10.1016/j.fuproc.2014.12.043

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…The difficulty of removing some impurities depends on the type of load in which they are present. For example, it is easier to remove impurities from paraffinic and naphthenic than from aromatic loads [18][19][20].…”

Section: A Technique For Kinetic Parameter Estimation In Heterogeneou...mentioning

confidence: 99%

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Fernandes,

Silva,

Araújo

2024

Korean J. Chem. Eng.

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Estimating kinetic parameters in heterogeneous solid catalytic reaction networks is known to being a difficult task. This work aims at proposing a down-to-earth methodology to obtain kinetic parameters from numerical experiments. We present three techniques: a multivariable linear regression model, a stochastic metamodeling, and an optimized Kriging interpolator connected to a least-squares method. We consolidate the methodology in two different applications. The first one is a process with few components in two reactions from where it was possible to acquire the reaction rate equations that fitted literature data. The second one is a complex industrial reaction network. The results showed that even if the candidate proposed reaction rate equations do not fit the experiments, it is possible to construct a mathematical metamodel that conforms to the behavior of the components. Statistical tests showed that in both cases the proposed models successfully fit the experimental data.

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Section: A Technique For Kinetic Parameter Estimation In Heterogeneou...mentioning

confidence: 99%

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Fernandes,

Silva,

Araújo

2024

Korean J. Chem. Eng.

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“…Linares et al [90] and his coworkers could prepare highly effective hydrotreating (HT) and hydrodesulphurization (HDS) catalysts by the facile impregnation of Co and Mo on a calcined CoNiZnAl LDH precursor. The study discussed the effect of M 2+ to M 3+ ratios in the CoNiZnAl LDH on the HT and HDS reactions, where the catalyst of M 3+ /M 3+ M 2+ = 0.25 was more effective for the HDS of thiofene, while the catalyst of M 3+ /M 3+ M 2+ = 0.33 exhibited better performance in the HT-reactions of cyclohexane.…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

“…The results were attributed to the high surface area of the prepared NiAl-LDH, which facilitated the good distribution of the Ni-active site.According to Wang et al[89], novel hydrotreating catalysts of NiS x /NiO x and MoS x /MoO x were prepared by low-temperature calcination of thiomolybdate-intercalated NiAl LDH at 300 • C and applied for dibenzothiophene (DBT)-hydrodesulphurization. Compared to the conventional NiAlMo-catalyst, the prepared phases showed duplicated HDS activities, which are related to a higher Ni-promotion activity by the formation of more coordinative unsaturated sites by the mild calcination of the LDH at 300 • C. As mentioned in Section 5.2., the calcination of LDHs usually yields oxides of high surface areas, porosities, and acid/base properties.Linares et al[90] and his coworkers could prepare highly effective hydrotreating (HT) and hydrodesulphurization (HDS) catalysts by the facile impregnation of Co and Mo on a calcined CoNiZnAl LDH precursor. The study discussed the effect of M 2+ to M 3+ ratios in the CoNiZnAl LDH on the HT and HDS reactions, where the catalyst of M 3+ /M 3+ M 2+ = 0.25 was more effective for the HDS of thiofene, while the catalyst of M 3+ /M 3+ M 2+ = 0.33 exhibited better performance in the HT-reactions of cyclohexane.The effect of two preparation methods on the HDS and HT activities of tungstateintercalated NiAlZr derived catalysts was studied[91].…”

mentioning

confidence: 99%

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

et al. 2022

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The fast development of the world civilization is continuously based on huge energy consumption. The extra-consumption of fossil fuel (petroleum, coal, and gas) in past decades has caused several political and environmental crises. Accordingly, the world, and especially the scientific community, should discover alternative energy sources to safe-guard our future from severe climate changes. Hydrogen is the ideal energy carrier, where nanomaterials, like layered double hydroxides (LDHs), play a great role in hydrogen production from clean/renewable sources. Here, we review the applications of LDHs in petroleum for the first time, as well as the recent breakthrough in the synthesis of 1D-LDHs and their applications in water splitting to H2. By 1D-LDHs, it is possible to overcome the drawbacks of commercial TiO2, such as its wide bandgap energy (3.2 eV) and working only in the UV-region. Now, we can use TiO2-modified structures for infrared (IR)-induced water splitting to hydrogen. Extending the performance of TiO2 into the IR-region, which includes 53% of sunlight by 1D-LDHs, guarantees high hydrogen evolution rates during the day and night and in cloudy conditions. This is a breakthrough for global hydrogen production and environmental remediation.

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“…Zinc-aluminium layered double hydroxides (Zn-Al-LDHs) were prepared using the co-precipitation method (Linares et al 2015). First, zinc nitrate and aluminium nitrate were dissolved in deionized water at four different concentrations, producing four solutions with different Zn/Al molar ratios (R=1, 2, 3, or 4).…”

Section: Preparation and Characterization Of Catalystsmentioning

confidence: 99%

Selective Analytical Production of 1-Hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one from Catalytic Fast Pyrolysis of Cellulose with Zinc-Aluminium Layered Double Oxide Catalyst

Zhang¹,

Lü²,

Ye³

et al. 2015

BioResources

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Zinc-aluminium layered double oxide (Zn-Al-LDO) catalysts derived from layered double hydroxides (LDHs) were prepared and used for the catalytic fast pyrolysis of cellulose to selectively produce 1-hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one (LAC), which is a valuable anhydrosugar derivative. Analytical pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) experiments were performed to investigate the LAC production under different reaction conditions. The results indicated that the Zn-Al-LDO catalysts were capable of greatly inhibiting the pyrolytic formation of levoglucosan (LG) and capable of promoting the formation of LAC and certain other products. The catalyst with the Zn/Al molar ratio of 2 exhibited the best catalytic capacity for LAC production. Both pyrolysis temperature and the catalyst-to-cellulose ratio affected the pyrolytic product distribution remarkably. The maximal LAC yield was obtained at the pyrolysis temperature of 350 °C and catalyst-to-cellulose ratio of 4 and featured a peak area percentage of 21.9% (calculated by GC/MS), compared with only 3.0% from the non-catalytic process. In addition, the LDO catalyst performed better than the previously reported montmorillonite K-10 catalyst on the enhancement of LAC production.

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Applications of CoMo/calcined quaternary hydrotalcites for hydrotreatment reactions

Cited by 9 publications

References 24 publications

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Recent Breakthrough in Layered Double Hydroxides and Their Applications in Petroleum, Green Energy, and Environmental Remediation

Selective Analytical Production of 1-Hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one from Catalytic Fast Pyrolysis of Cellulose with Zinc-Aluminium Layered Double Oxide Catalyst

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